Machine for operating upon hides, skins, and leather



R. F. WHITNEY 2,030,136

AND LEATHER MACHINE FOR OPERATING UPON HlDES, SKINS Filed July 7, 1934 4Sheets-Sheet l Feb, 11, 1935,, R w N 2,930,13O

MACHINE FOR OPERATING UPON HlDES, SKINS, AND LEATHER Filed July 7, 19544 Sheets-Sheet 2 A33 3 38 50 A 52 2242 I, I m $8 50 1 67 Feb, 11, 1936.R. F; WHITNEY I 2,030,130

MACHINE FOR OPERATING UPON HIDES, SKINS, AND LEATHER Filed y '7, 1934 4Sheets-Sheet s a3 m4 /M O a 2 jg 5 g 3i 5%? 3 m7 //4 /Z& 5 a4 6 /0 20 m22 I\\ & V V

Ebb. 11, 1936. R wHlTNEY 2,030,130

MACHINE FOR OPERATING UPON HIDES, SKINS, AND LEATHER Filed July 7, 19344 Sheets-Sheet 4 Patented Feb. 11, 1936 UNITED STATES PATENT OFFICEMACHINE FOR OPERATING UPON HIDES, SKINS, AND LEATHER Application July 7,1934, Serial No. 734,117

20 Claims.

This invention relates to machines for operating upon hides, skins andleather. While the invention is embodied in a machine for performingbeaming or scudding operations upon skins it. is to be understood thatthe invention and various important features thereof may have otherapplications and uses.

This invention is an improvement upon the machine shown in United StatesLetters Patent No. 1,658,506, granted February 7, 1928, upon anapplication filed in the names of J. A. Wheeler and R. F. Whitney. It isan object of the present invention to improve and simplify theembodiment of the invention disclosed in the patented machine and toprovide a machine adapted particularly for the handling of small piecesof work such as kid and calf skins.

To these ends and in accordance with an important feature of theinvention there: is provided a work support upon which each piece ofwork in turn is clamped, during treatment, by a work clamping memberarranged to be operated by the work support in such manner that as thework support moves toward work presenting position with respect to abladed cylinder the work clamping member is caused to approach the worksupport and finally to engage the work and clamp it firmly on the worksupport, the work support and work clamping member remaining stationaryin work presenting position during treatment of the work by said bladedcylinder. After the work support has moved a predetermined distance to-Ward work receiving position away from the bladed cylinder, to insurethat the work piece in 5 the machine is spaced from said bladedcylinder, the work clamping member is lifted promptly from engagementwith the work sothat the operator may remove the work early in themovement of the work support toward open position and thus be enabled tointroduce a fresh piece of work as soon as the work support and the workclamping member arrive at wide open work receiving postion. Convenientlythe work clamping member is pivoted to the work support by cam membersarranged to be guided by cam rolls carried by the frame of the machine.

' Another important feature of the invention resides in an arrangementwherein a shaft, coaxial with 'a shaft supporting the bladed cylinder,is provided with connections for operating a flexible work support orbolster to move the latter bodily toward and from the bladed cylinder sothat pieces of work may be readily introduced when th'e'bolster is inwork receiving position and then 5 operated upon while the bolster ispressing the work against the bladed cylinder. As shown, the bolster iscarried at one end by the work support to which the work clamping memberis pivoted and by which it is operated, in an organization wherein thework support, the bolster, and the 6 work clamping member are alloperated in properly timed relation by connections with the single shaftlocated in coaxial relation to the shaft which carries the bladedcylinder. There is thus provided a simple, durable, and highly efficient10 and compact construction for performing scudding or beamingoperations upon pieces of work such as calf and goat skins.

These and other features of the invention and novel combinations ofparts will now be described in detail in the specification and thenpointed out more particularly in the appended claims.

In the drawings,

Fig. l is a front elevation partly in section of a beaming or scuddingmachine showing one embodiment of the invention;

Fig. 2 is an end view looking from the left in Fig. 1, parts beingbroken away the more clearly to disclose the invention;

Fig. 3 is a section along the line III-III of Fig. 1, looking in thedirection of the arrows;

Fig. 4 is a view of the starting and stopping mechanism of the machine;

Fig. 5 is a View along the line VV of Fig. 4;

Fig. 6 is a view taken along the line VIVI of Fig. 4;

Fig. 7 is a sectional view along the line VII-VII of Fig. 4;

Fig. 8 is a view similar to Fig. 2 showing an auxiliary work clampingmeans; and

Fig. 9 is a View similar to Fig. 8 showing the work clamping parts inopen work receiving position.

In the illustrated machine, which is specially designed to performbeaming or scudding oper- 0 ations upon kid and calf skins, there isprovided a bladed cylinder or drum ID, the blades 12 of which aredisposed somewhat helically upon the surface of the cylinder and serveas both scudding and spreadingblades while blades M are disposed nearlyor quite parallel tothe axis of the drum and serve more as scrapingblades. Preferably and as shown, the drum I0 is secured upon a hollowshaft or quill l6 mounted in bearings ll'in end members l8 (Fig. 2) ofthe machine frame. Secured to the quill I6 as by a spline 20 (Fig. '7)is a large gear wheel 22 arranged in mesh with a pinion 24 (Figs. 1 and2) fixed to a counter shaft 26 which also carries a pulley 28 adapted toserve as' thepower pulley of -85 of the box "n,

the machine. With power applied to the pulley 28 the bladed drum is willbe continuously rotated as in practically all beamhouse machines.

In the illustrated construction, the skins are supported while beingtreated by a work support mechanism comprising a combined work supportand work clamping member so carried at the upper ends of a pair of swingarms 32 pivotally mounted at their lower ends upon posts 33 constitutingpart of the end frames 18 of the machine. For operating the swing arms32 about their pivots 35 there is provided a pair of pitmarm 34 eachhaving its front end pivoted at 36 to the upper end of the correspondingswing arm 32, and its rear end pivotally connected to a crank pin 38(Figs. 2 and '7) said crank pin being carried by a crank arm rigid witha hub portion is of a cam wheel .2 splined at 14 to a shaft 46 thatextends through and projects from the ends of the hollow shaft or quillH3. As shown most clearly in Fig. 7, the shaft to has end bearings at 48within the quill it, the said shaft :35 carrying at one end the hubportion to of the cam wheel 42, as stated above, and at its other endmerely a crank arm (not shown) to operate a pitman like the pitman Asindicated in Figs. 2 and '7, each pitman comprises a middle portionwhich is provided at its ends with right and left hand threads foradjustable engagement with similarly threaded socket carrying members 56forming parts of the pitman so that the latter may be adjusted in lengthto facilitate proper positioning of the swing arms 32 in relation to thedrum IE3 and to an upper clamping member hereinafter described.

The work support mechanism'mentioned above comprises also a flexiblesupport or bolster 52 of a Width coextensive with the length dimensionof the drum I ll, the purpose of the bolster 52 being to support a pieceof work such as a skin 5 (Fig. 3) for the action of the blades I2, I4 onthe drum id. The flexible support or bolster 52 is attached at its lowerend by means of a clamping bar 56 to a relatively heavy rod or pipe 58(Fig. 3) rigidly clamped in the lower ends of two levers, one of whichis shown at 68 (Figs. 1 and 2), each pivotally mounted at B2 on an endframe it of the machine. At its upper end the bolster 52 is disposedover the upper surface of the lower work clamping member 30 and isrigidly secured by bolts to a. front bar 51 of said lower work clampingmember 30. Pivoted at $8 to each swing arm 32 is a link 18 which isslidable at its other end through an opening of suitable size in a boxmember 22 pivotally mounted at '14 upon an intermediate portion of thelever 50, a spring l6 being interposed between washers 18 on the link 20and another washer at the other .-end of-the spring it, the latterwasher being backed by nuts 82 screw threaded on the link I0 to adjustthe tension of the spring it. t its free end the link it screw threadedand provided with nuts 35. adapted to engage an extension thearrangement being such that the levers are swung forwardly as the swingarms 32 move forwardly to carry the bolster 52 to work receivingposition, whereas, upon .movement of the swing arms 32 in the reverse"direction into the position shown in Fig. 2 the levers 6d are move tocarry the bolster 52 into position to press the work against the druml8, yielding of the bolster 52 away from the drum s It being permittedby the springs '56, thereby to accommodate variations in the thicknessof the work.

For co-operation with the lower work clamping member 36 there isprovided an upper work clamping member 90, the said work clamping memberbeing shown as an I-beam secured at its ends to a pair of cam members92, each pivoted at $4 to the upper end of the adjacent swing arm 32.Each cam member 92 has a cam slot 96 for the reception of a cam roll 98rigidly carried by a casting I00 adjustably secured by bolts I02 to theupper ends of the frame posts 33. The castings I80 may be readilyadjusted by loosening the bolts I02 and by proper manipulation ofadjusting screws or bolts I04. As shown in Fig. 1, the bolts I02 alsopass through a frame cross bar I 03 secured to the castings I00. It willbe understood that upon movement of the swing arms 32 to the right inFig. 2 the cam members 92 will be swung about the pivots 34 by the camrolls 98 in the cam slots 90, the arrangement being such that the upperwork clamping member is swung upwardly to a wide-open position tofacilitate removal of the work and insertion of a fresh piece of work.However, the clamp member 90 remains in clamping position during thefirst part of the outward movement of the swing arms 32, so as not torelease the work until it has been moved away from the blades of thecylinder I0.

For operating the swing arms 32 through the pitmans 34 and the shaft 46,at the will of the operator, there is provided means for clutching thecam wheel 42 to the gear 22, it being recalled that cam wheel 42 isfastened to shaft 46 and the gear 22 is splined to the hollow shaft orquill I0. As shown most clearly in Figs. 4 and 7, the. clutching meanscomprises an annular member I06 carried by a circular hub member 101, ofthe cam wheel 42, extending into an open cup portion of the gear Wheel22. Pivoted at I08 to the annular member I08 is a toggle link member II0 adjustable in length through having one constituent part screwthreaded into another part,

the toggle link I I0 having a ball portion II2 arranged to engage in asocket I I4 in the end of a link member II 6 pivoted at IIB to theannular part of the cam wheel 42. Pivoted to the link member H6 is anarcuate clutch member I20 adapted to engage an inside cylindricalsurface I22 of the cup portion of the gear Wheel 22. Upon rotating theannular member I06 in a clockwise direction, in Fig. 4, the pivot I08 ismoved with the member I06 to bring the center of the pivot in the dottedline in said Fig. 4, thus in efiect straightening a toggle of which oneportion is the toggle link member I I0 and the other portion is a partof the annular member I 06. By

thus straightening the toggle the arcuate clutchmembers I20 are causedto engage the inner surface I22 of the gear wheel 22, thus clutching themember I06. When the stop member I24 is projected into the path of oneof the arms I30 and engages the wooden block I28 therein the annu larmember I06 is turned in a counterclockwise direction, thus breaking thetoggle and permitting a spring I32 to move the arcuate clutch mem- Thismoveadjacent portion of the cam member 92.

ber I20 away from the clutching surface I22 on the gear wheel 22. Itwill be noted that the springs I22 serve also as buffers to soften theshock by which the cam wheel 42 and its connected parts are brought torest. A pair of studs I33 on the annular member I06 project there:- frominto position to engage opposite sides of a spoke I35 of the cam wheel42 to prevent undesirable displacement of the annular member I06. Uponinspection of Figs. 1, 2, and 3 it will be observed that the stop memberI24 is secured to a shaft I40 mounted in bearings carried by the machineframe and that at its forward end said shaft I40 carries an arm I42adapted to be: engaged by an arm I44 of a treadle lever I46 pivoted atI48 on the frame post I8, depression of the treadle I46 being resistedby a spring I55 one end of which is secured to a portion of the machineframe and the other end of which is attached to an arm I52 extendingdownwardly from the rear end of the shaft I ll the spring I50 having thefunction also of holding the stop member I24 yieldingly against the rimof the cam wheel 42 until a notch I54 in the rim is: encountered by aroll I56 carried by the member I24.

If desired an additional work clamping member I 60 (Figs. 8 and 9) maybe provided to insure against displacement of the work. While the workclamping member 95 is amply sufficient to hold all the common grades ofwork during treatment thereof by the blades I2 and I4, the additionalwork clamping member I60 may be advantageously provided for larger andheavier pieces of work which are also unusually difficult to send or .tofine hair. As shown, the auxiliary work clamping member I60 is mountedupon levers I62 pivoted at I64 upon the cam members 92. Each lever I62has a curved arm I66 extending over the top of the corresponding camroll 95, said curved am having a cam portion I68 for a purpose whichwill be hereinafter described. Connected to the end of the arm I66 is aspring I10 the other end of which is adjustably secured to an As shownmost clearly in Fig. 9, the auxiliary clamping member I60 is providedwith a concaved surface I'I2 for smoothly engaging the work and pressingit against a correspondingly convexed surface on the work support orlower clamping member 30.

It will be understood that, the machine shown in Fig. 8 is at the samepoint in its cycle of operations as the machine shown in Fig. 2, thatis, with :the work clamping devices stationary in work clampingposition. Following depression of the treadle I46 (Fig. 2) the crank pin38 will move upwardly in the direction of the arrow (Fig. 2) with theresult that the swing arms 32, work supporting member 30, and workclamping members 90 and I 60 will be moved toward the right in Figs. 2and 8. Since approximately the first half I13 of the lower wall of thecam slot 96 is concentric with respect to the axes of the pivot pins1350f the swing arms 32, the Work clamping member'90 will not bedisturbed while the crank pin 38 is moving upwardly through an arc ofabout 45, the reason for this being that the work should remain firmlythat is, positively clamped 70 rto the work support 30 so long as anypart of the work is still being contacted by the blades l2 and I4. Atthe'point above mentioned, that is, when the crank pin SShas movedthrough about 45, the auxiliary work clamping member 60 starts ;to.moveupwardly, this being due to the fact that the upwardly curved camsurface I68 on the arm I66 permits corresponding downward movement ofthe arm I66 under the action of the spring I10. By the time the crankpin 38 has traveled through an arc of both clamping members 90 and I60have moved upwardly away from the work so that the operator may begin towithdraw the latter from the machine, the combined upward movement ofthe clamping members 90 and I60 as thus far described being due to a.cam surface I74 on the lower wall of the cam slot 96. From then on eachcam member 92 is swung about its pivot 84 due to the passing of saidpivot 94 beyond a line connecting the axis of the cam roll 98 with theaxis of the pivot 35 of the swing arm 32, the result being that what hastheretofore been ,a forward movement of the cam members 92 (that is, inthe direction of movement of the swing arms 32) is reversed with theresult that the ,cam

members 92 tip backwardly as shown in Fig. 9

during which there is a rearward movement of the cam slot 96 withrespect to the cam roll 98. Fig. 9, it will be understood, shows thework clamping members 90 and IE0 in fully open position in which theyoffer no obstruction to the introduction of a fresh piece of work. Uponagain depressing the treadle I 46, the work clamping members 90 and E60and the work support 30 move in the reverse direction, that is, from theposition shown in Fig. 9 to that shown in Fig. 8, with the result thatthe work is first clamped by the clamping member 90 and then by theauxiliary work clamping member I60. In both cases these work clampingmembers come down squarely upon the work so as not to be drawnthereover, since the latter might result in sending the work.

In operating the machine, a skin 54 is introduced into the machine whenthe upper work clamping member 90 (and I00, if present) and the swingarms 32 and the lower work supporting and work clamping member 30 are inopen work receiving position (Fig. 9). The treadle I46 is then depressedwhereupon the swing arms move to the positions shown in Figs. 2 and 8.During this movement of the swing arms the upper clamping member 90(together with I60) moves downwardly to engage the work resting upon theupper surface of the lower work clamping and supporting member worktaking place before it is presented to the blades of the cylinder I0.Also the levers (it are moved by the swing arms 32 to tension theflexible work supporting bolster 52 and bring it blades I2 and I4 on thedrum I0, it being recalled that the drum i0 is continuously inrotation.-

After an interval, during which the blades operate upon the work, theoperator again depresses the treadle I46 to cause the swing arms 32 .tomove to open position, the upper work clamping member 96 (and E60)moving upwardly to release the work only after the bolster 52 has beenmoved away from the blades of the cylinder I0 far enough to insure thatthe work will not be pulled into the machine by the rotating cylinderI0. This delay in the upward movement of the clamping member $30 (andI60) is due to the fact that the first half of the slot 92 is concentricwith respect to the pivots 35 of the swing arms 32. The operator startsto remove the skin as soon as the latter is released at the beginning ofthe upward movement of the work clamping member 90v since it has to bereversed to secure treatment of the remaining portion of the skin. Theotherhalf,

30, the clamping of the i. e.,'the untreated portion of the work, isthen introduced into the machine by throwing it over the lower clampingmember 3-9 into position upon the flexible bolster 52 which has beenmoved away from the drum it! into a work receiving position along withthe swing arms 32 and lower clamping member 30. No attempt is made tostraighten out the work except as that may be accomplished by stretchingthe work along the lengthwise dimension of the lower work clampingmember 30, for the reason that, as the bolster approaches the drum, theblades of the latter in first contaoting with the skin spread it out andthen almost instantly operate to clean the surface of the skin of allhair, loose epithelial cells, and dirt. While the machine may beemployed in unhairing operations upon light hides and skins, it isspecially intended to perform the operations of fine hairing and beamingor scudding, that is, removing the fine hairs which persist after theusual unhairing operation and cleaning the surface of the skins fromloose epithelial cells and hair follicles, and from the dirt which hasremained after the liming and unhairing operations.

Having described my invention, what I claim as new and desire to secureby Letters Patent of the United States is:

1. In a machine for operating upon hides, skins and leather, a tool fortreating the work, a work support movable between work receiving andWork presenting positions with respect to said tool, said work supportbeing stationary in its work presenting position while said tool isoperating on a piece of work, a member for clamping the work on the worksupport just before the work is pressed against the tool, andco-operating cam members arranged to move the work clamping member tooperative position as the work support moves to present the work to saidtool, one of said cam members being stationary and the other movablewith the work support during movement of the latter to work presentingposition.

2. In a machine for operating upon hides, skins and leather, a rotarytool for treating the work, a work support having a pivotal mountingabout which it is oscillated between work receiving and work presentingpositions with respect to said tool, a member pivoted to the worksupport for clamping the work on the work support just before the workis pressed against the tool, said work support and work clamping memberremaining stationary during treatment of the work by said tool, andco-operating cam members mounted on the work support and on the frame ofthe machine and operated by the work support during movement of thelatter in one direction about its pivotal mounting to move the workclamping member positively to its operative or work clamping position.

3. In a machine for operating upon hides, skins and leather, a rotarytool for treating the work, a work support movable between workreceiving and work presenting positions with respect to said tool, swingarms upon which said work support is mounted, a member pivoted to theswing arms for clamping the work on the work support just before thework is presse against the tool, and co-operating cam members and camrolls mounted on the work clamping member and on the frame of themachine and operated by the work support to move the work climpingmember positively both toward and from the work support in timedrelation to the movements of the work support.

4. In a machine for operating upon hides,

skins and leather, a rotary tool, a hollow shaft to which said tool issecured, means for driving said shaft, a work support, a shaft mountedin said hollow shaft and arranged to operate the work support, Workclamping means pivoted to the work support and arranged to be operatedby the latter, and a clutch under the control of the operator forclutching the last recited shaft to said hollow shaft to effect movementof the work support toward and from said rotary tool.

5. In a machine for operating upon hides, skins and leather, a rotarytool for operating on the work, a work support movable between workreceiving and work presenting positions with respect to said tool, ahollow shaft to which the rotary tool is securely fastened, power meansfor driving said shaft, means comprising a shaft mounted coaxially withrespect to said hollow shaft and having connections to operate said worksupport, a work clamping member operated by the work support alternatelyto clamp the work on the support and to release the same, and means forclutching the last recited shaft to said hollow shaft whereby the worksupport may be moved toward and away from the rotary tool and theclamping member toward and away from the work support.

6. In a machine for operating upon hides, skins and leather, a rotarytool for treating the work, a work support movable between Workreceiving and work presenting positions with respect to said too-l, amember for clamping the work on the work support just before the work ispressed against the rotary tool, cam members connected to said workclamping member and pivotally mounted upon the work support, and camrolls mounted upon the frame of the machine for engagement with said cammembers for positively operating the work clamping member both towardand from co-operative relation with respect to said work support as thelatter moves between work receiving and work presenting positions.

'7. In a machine for operating upon hides, skins and leather, a rotarytool, a hollow shaft to which said cylinder is secured, means comprisinga gear wheel splined to said shaft for driving the latter, a worksupport, a shaft mounted in said hollow shaft and arranged to operatethe work support, and a clutch under the control of the operator forclutching the last recited shaft to said gear wheel to effect movementof the work support toward and from said rotary tool.

8. In a machine for operating upon hides, skins and leather, a bladedcylinder for operating upon the work, a hollow shaft supporting saidcylinder, a gear wheel splined to said shaft, a pinion to drive saidgear wheel, a shaft mounted for rotation in said hollow shaft and havingcrank arms secured to its ends, pitmans connected to said crank arms, apair of swing arms arranged to be operated by said pitmans, a worksupport carried by the swing arms, and means under th control of theoperator to clutch the last-recited shaft to said gear wheel to effectmovement of the swing arms and work support alternately toward and fromthe bladed cylinder.

' 9. In a machine for operating upon hides, skins and leather, a rotarytool for operating upon the work, a shaft to which said tool is secured,power means to drive said shaft, a bolster to support the work duringtreatment by said rotary tool,

means connected to the ends of the bolster movably to support thelatter, a shaft mounted axially with respect to the first-mentionedshaft for rotation therewith and arranged to operate said bolstersupporting means to move the bolster bodily with respect to the bladedcylinder, and means under the control of the operator to clutchthesecond-mentioned shaft to said power means to effect movement of thebolster alternately toward and from the bladed cylinder.

10. In a machine for operating upon hides, skins and leather, a rotarytool for operating on the work, a hollow shaft to which said tool isseourely fastened, means for driving said shaft, bolster to support thework during treatment thereof by the rotary tool, swing arms connectedto opposite ends of the bolster movably to support the latter, a shaftmounted for rotation in said hollow shaft and arranged to operate saidswing arms to move the bolster bodily with respect to the rotary tool,and a clutch under the control of the operator for operativelyconnecting the last-recited shaft to said hollow shaft during rotationof the latter to cause movement of the bolster alternately toward andaway from said rotary tool.

11. In a machine for operating upon hides, skins and leather, a rotarytool, a hollow shaft journaled in the frame of the machine and to whichsaid tool is securely fastened, means to drive said shaft, a worksupport, a bolster connected at one end to said work support, means formovably supporting the other end of the bolster below said cylinder, ashaft journaled in said hollow shaft, means driven from the last-recitedshaft to move the work support and bolster bodily toward and from therotary tool, and a clutch device under control of the operator foroperatively connecting the last-recited shaft to said hollow shaftduring rotation of the latter through 180 whereby said work support andbolster are moved alternately between work receiving and work presentingpositions with respect to the rotary tool.

12. In a machine for operating upon hides, skins and leather, a rotarytool, a hollow shaft journaled in the frame of the machine and to whichsaid tool is securely fastened, means to drive said shaft. a worksupport comprising a pair of swing arms, a bolster connected at one endto said work support, swing arms and a connecting bar for supporting theother end of the bolster below said cylinder, links connecting the worksupport swing arms to the bolster supporting swing arms, whereby thelatter are operated by the former so that the bolster moves bodilybetween work receiving and work presenting relation to the rotary tool,a shaft journaled in said hollow shaft and arranged to operate said worksupport and bolster, and a clutch device under control of the operato'rfor operatively connecting the last-recited shaft to said hollow shaftduring rotation of the latter through 180.

13. In a machine for o'peratin upon hides, skins and leather, a rotarytool for operating on the work, a shaft mounted in the frame of themachine and arranged to have said tool fixedly secured thereto, meansfor driving said shaft, a work support movable toward and away from saidrotary tool, a shaft mounted coaxially with respect to thefirst-mentioned shaft and arranged to move said work support yieldinglytoward said rotary tool, and means for clutching said shafts to eachother for rotation of the second-mentioned shaft through 180 whereby thework support is moved alternately between work receiving and workpresenting positions with respect to said rotary tool.

14. In a machine for operating upon hides, skins and leather, a bladedcylinder for operating on the work, a shaft mounted in the frame of themachine and arranged to have said cylinder fixedly secured thereto,means for driving said shaft, a work support comprising a bolster and asupporting device therefor movable toward and away from said cylinder, ashaft mounted coaxially with respect to the first-mentioned shaft, crankarms connected to the ends of the second-mentioned shaft, pitmanspivoted to said crank arms and to said bolster supporting device, andmeans for clutching said shafts to each other for rotation of thesecond-mentioned shaft through 180 whereby the bolster is bodily movedalternately between work receiving and work presenting positions withrespect to said cylinder.

15. In a machine for operating upon hides, and leather, a tool foroperating on the work, a support for the work while it is being operatedon by said tool, means for moving the work support toward and from saidtool, a work clamping member movable toward and from the work supportduring movement of the latter toward and from said tool, means to causethe described movements of said work clamping member, and an auxiliarywork clamping member mounted upon the first-mentioned work clampingmember and arranged to be operated in timed relation to the movements ofsaid work support.

16. In a machine for operating upon hides, skinsand leather, a tool foroperating on the work, a support for the work movable between workreceiving and work presenting positions with respect to said tool, awork clamping member pivotally mounted upon said work support,co-o-perating cam roll and cam-slotted members for operating the workclamping member during movements of said work support, and an auxiliarywork clamping member arranged to be operated by one of said cam roll andcam-slotted members toprovide additional clamping effect upon the work.

17. In a machine for operating upon hides, skins and leather, a tool foroperating on the work, a support for the work while it is being operatedon by said tool, swing arms at the upper ends of which said work supportis mounted, means for operating the swing arms to move the work supportbetween work receiving and work presenting positions with respect tosaid tool, a member mounted on the swing arms and 0perative to clamp thework upon said work support, an auxiliary work clamping member mountedon the first-mentioned work clamping member, and means for operatingboth work clamping members in timed relation to each other and to saidwork support.

18. In a machine for operating upon hides, skins and leather, a tool foroperating on the work, a support for the work movable between workreceiving and work presenting positions with respect to said tool, awork clamping mem ber, members secured at each end of said work clampingmember and pivotallymounted upon said work support, co-operating camroll and cam-slotted members carried by the frame of the machine and bysaid pivoted members to cause movements of the work clamping member intimed relation to movements of the work support, and an auxiliary workclamping member mounted on said pivoted members and arranged to beoperated by one of said cam roll and camslotted members in timedrelation to the movements of said work support.

19. In a machine for operating upon hides, skins and leather, a tool foroperating on the work, a support for the work while it is being operatedon by said tool, swing arms carrying said work support, means to operatethe swing arms to move the work support alternately between workreceiving and work presenting positions with respect to said tool,cam-slotted members pivotally connected to said swing arms, a workclamping member carried by said camslotted members, cam roll membersmounted on the frame of the machine and arranged to cooperate with saidcam-slotted members to operate the Work clamping member in timedrelation to the work support, and an auxiliary work clamping memberarranged to be operated by one of said cam roll and cam-slotted membersin timed relation to the movements of the work support.

20. In a machine for operating upon hides, skins and leather, a tool foroperating on the work, a support for the work while it is being operatedon by said tool, swing arms carrying said work support, means to operatethe swing arms to move the work support alternately between workreceiving and work presenting positions with respect to said tool,cam-slotted members pivotally connected to said swing arms, a workclamping member carried by said camslotted members, cam rolls mounted onthe frame of the machine and arranged to co-operate with said slottedmembers to operate the Work clamping member in timed relation to thework support, an auxiliary work clamping member pivotally mounted uponsaid cam-slotted members and arranged to be operated by said cam rollsin timed relation to the movements of said work support.

ROBERT F. WHITNEY.

